AGD certainly has garnered quite a few praises, but if you haven't purchased yet, Steve Guttenberg just sis an excellent video with the Mola Mola and another class D amp and I believe the AGD, too
After 50 years, I have finally found my destination amps... AGD Audions!
Within minutes, I understood what everyone was saying. Now, after about a month of listening, I am convinced that I have indeed found the "holy grail". A SS amp that completely satisfies a SET guy... and more. I am thrilled daily by the way the Audions grab me. Now, it is no longer merely listening. It is being enveloped by a sound that opens a window into the musician's hearts and souls. They do so with an incredible lack of distortion, detail and transparency. I have never heard anything like it. Excuse what appears to be hyperbole but now hearing the Audion mono blocks I am overcome with the emotion I hear and emotion I feel.
I have come to understand that AGD Class D amps are indeed unique. The designer, Alberto Guerra, has a long background in integrated circuit development holding 10 patents including those for the MOSFETs used in AGD amps. The galium nitride modules are the only, and patented, GaNs designed specifically for Audio. All other GaNs were designed for battery chargers, radar or lidar, etc. Alberto, like Nelson Pass and SITs, owns all these GaNs made.
These amps are extremely fast. Their switching frequency is far beyond other Class D amps. AGD amps sound organic and natural with great realism like a SET but with liquidity and slam. The definition and immediacy puts them above any SET I have heard. The “tube” on top of AGD amps is a kind of tribute to the original 1906 Audion tube even though they are not vacuum tubes. They do however contain the full output stages. This contributes to heat dissipation and is a clever way to make the amps good for future upgrades. No need to ever buy a “new and improved” model. Just replace the tube. Alberto has issued a Mark II tube which is already used in his new amps and available for older.
Some would question the unique cosmetic design but once they are heard they become very beautiful. And, personally, I find them very attractive beyond the normal metal box. And the attention to fit and finish is of a high level including two excellent power cords and flight cases for shipping.
AGD amps are my final, destination amps. I am thrilled daily. My only considered upgrade would be to the top line Gran Vivaces.
Thanks @testrun . Chat with AGD support was quick. Below are my questions with the responses, verbatim. Q: Hi there. What is the warranty coverage for your products and are warranties transferable? Q: And is the warranty transferable? |
@mglik I’m in a similar position having moved from Atmasphere S30 OTL to AGD Audions. I loved the OTL sound but the Audions (and I suspect Ralph’s class D amps) give a similar sound but with more detail and even better dynamics. I listen mainly to rock/blues and the Audions just seem closer to the ‘live’ sound that I want. I have Avantgarde Duo horns and, for my tastes, the combination works brilliantly.
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@mglik do you still feel the same about the AGD Vivace's? I was lucky to purchase mine in February 2020 and have loved them since. |
I’m late to add to this thread but I’ve posted elsewhere about my reviews on AGD Audion. I’m an early adopter and started with the Mark 1 and upgraded to the Mk 2, which brought significant improvements. If you look at my profile and systems in audiogoN, you will see that I am a devout SET fan. And the AGD Audions are the best SS amps I’ve tried and the only one I am still keeping. I’ve tried First Watt F2J and SIT2. They were bought, stayed a while, but ultimately sold. And I also no longer lust fir the next great SET amp. The Audions AGD Mk w and my custom Berning 300B OTL SET amp. If I want a little more wetness, air, I go with my Berning with 1940’s to early 1950’s WE300B. If I want a little more power and slam, I switch to the Audions. Ultimately, I’m looking yo have a permanent 2nd system for the Audions with lower efficiency speakers compared to my current 100dB Rethm Saadhana V4. Perhaps a Fyne F1-12 if I can afford it or a used TAD CR1. Would appreciate if anyone has tried their AGD amps on the TADs or Fynes. Thank you Alberto, for a great amp. Also, I’ve met Alberto in person at recent LA audio show. Such. Nice gentlemen and true audiophile. |
Yes sir-- I'm on about 60db or less (quiet for me) and everything is there!! Thats with the Tetra 305 or Proac D2 or Spatial M3 Triodes or pick a Spendor classic 1,2 or 3-- have them all -- I'm done with amps until Al comes up with something down the road that could better the GV (don't see how). Then again I'm scared to change a thing. I will put his Andante Pre up against my Levinson 526 soon. Who knew it could get this good-=-= |
First Class
axo0oxa -- I recvd my Gran Vivace yesterday!! Was up damn near all eve. I also have the regular Vivace- Have had that for a few months and just had to try the GV. Vivace = 911 Gran Vivace = 911 Turbo -- It's that simple--- Not sure what I will do with the original pair?!?!!? ENJOY== |
Just purchased the Vivace. Truly loving this amplifier and appreciating that it is Class D and so good based on the bad rep Class D has had in the past. I am coming from a decent pair of tube monoblocks (Opera-Consance Cyber 800SE) and the Vivace hasn't lost the tube magic those non SET amplifiers brought out and appreciated with those monoblocks. The Vivace has added so much more to the music that I just cannot compare the two. Again the tubes were a good pair of amplifiers that resided in my systems for years, but yes there are better tube amplifiers at a much higher price and if you are thinking tube magic you think SET not my amplifiers so my comparison is a limited one when comparing the Vivace to tube magic. I have only owned the Vivace for a couple days and still adjusting to all the improvements and know that over time like all things areas of improvement will likely become apparent so I am glad it is modular and there is an upgrade pathway open to me because I am sold on Alberto's designs. The one area that I may, not sure yet, might like to be a bit stronger is in the very low level listening levels. For this reason I was happy to hear that the next step up in the product line seems to have addressed this potential weak spot. Again I cannot say it is a weak spot with authority, because I do not have enough time to declare such a statement as fact. No matter this amplifier is so good that even if the lower volume does not match the higher volume I do not care. I have not heard an amplifier in my system create such realism and magic and when I say lower volume levels there hardly is any amplifier I have heard that matches the excitement that moderate to loud level listening brings, so maybe I should not refer to it as a "weak" spot, but just stress that at normal to higher levels of listening this amplifier is in the upper tier of amplifiers and maybe even in a class of its own for its price point. |
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I was going to post this on the other Class D thread but that has Died On The Vine… This silly argument reminds me of the Motorcycle Brand Wars in the 80’s and 90’s and kind of still lives on today by a few hard core HD riders. I was at a track day at the Hasslet MS Ranch in Oklahoma and I rolled out my latest piece of Italian machinery an Aprilia RSV1000SP a Factory Superbike. One of my customers was there with 4 year old Honda CBR600 and looked at my machine, he just said WOW and all I have is this little Honda. I was in the MC business as a parts supplier at the time and always had the latest gadgets in my shop. So we went out for a couple of sessions and got our timing sheets. The next session came up and I gave the kid the Aprilia to ride for that session. I then rolled out a 10 year old Honda RVF400 I bought in Canada (never was sold in US Market) I went out on the track and and lapped this kid twice on the latest gadgetry from Naoli Italy on a 10 year old Honda that had not been service in 4 years other than rubber and oil. We came back in got our timing sheets and the kid was slacked jawed his times were slower. I looked at him and said “You have have apple before you can polish it”. I told the kid it only matters that you ride and not what you ride. I think this relates and I am sure many will not get it. Listen to what topology you like ABCDZRF, if it works for you then great I am happy for you. Bottom line for me is it’s about the Music (the ride) not the vehicle you use. @mglik I am so happy for you and I am giving the AGD’s a test ride. Many of you will twist this post all around and come at me with your agenda. Well enjoy your ride cause I going to get my deceased sons Triumph Speed Triple out and ride around the lake today it was his favorite place to ride. Let the twisting begin. |
@mikepowellaudio reading comprehension is an issue for you all. I am not a class D hater. Every month there are new class A and AB integrated’s, power and mono blocks hitting the market. https://parttimeaudiophile.com/2021/07/09/audio-by-van-alstine-dva-m225-monoblock-amplifiers-review/ We will see in 10 years as for your energy waster tax that will add what $4.00 to the price of a class a product. It will fail just as the Gas Guzzler Tax of 1978 did. Consumers speak with their wallets and Suburbans, Tahoe’s and Pickup Truck reign supreme in sales and all are taxed under that statute. At the end of the day the consumer tells the manufacturer what to build and sell. Also I have class D equipment in my house as well as A and AB equipment. There is no argument and supply chain will recover and the market will make what the consumer wants. |
@earlyflynn if you cant see that Class A is dying youre not watching. I dont mean in our eyes, I mean in ability to buy the legacy components from which to build the amps. The devices to make old school amps is dwindling down and they are obsoleting them. There is no demand except for HiFi, so there is no demand. The generations under me (with a few exceptions im sure) have no interest in heavy and hot and huge, its an embarrassment to them. Class A is a blatant waste of energy and these days its seen as gross and not applauded except for our little hobby. I own several Class A amps and am not willing to let them go at this point regardless of the aforementioned. Truth is production of Class A amplifiers will most likely be buried in 10 years. If things go the way they have been, expect Class A amps to have an energy waster tax attached to them. And I know its a hard pill to swallow but Class D is finally at world class level. I did not like it either. Im a class D hater. But Im honest and I can not argue this one out . All the best ... |
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Not biting on your BS. I own a Class D amp. Listening to it now out back watching Doves enjoy getting a drink from our pool. I also have reached out to AGD and I am willing to buy their equipment and then pass judgement. Unlike others here. Maybe you included. What I was laughing at was the ridicules statement that: Classes A or AB. Those technologies are drying on the vine, especially now that we have class D at world class levelPoor clown its dying on the vine but yet they are not. Please enjoy your evening as I will. |
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Hey Guys, Ill weigh in on the difference between Grand Vivace and regular or Audion. The place I noticed it the most was when playing at LOW volume the full spectrum of frequency and dynamic stayed coherent and completely balanced. The Gran Vivace uses a totally different output GaN Tube, the others use the identical tube but Vivace has a larger power supply so you can run it harder for more output and a slight fuller texture in the mid. The Gran vivace is a different animal, as it should be It is the sweet spot if we are comparing world class, we can put this one up against Wavac, Gryphon, DartZeel Etc. remember it has a superior technology to Classes A or AB. Those technologies are drying on the vine, especially now that we have class D at world class level. so the Gran Vivace is like putting Bruce Lee in an amp. Its precise and deals a hell of a punch. Even at low volume your woofers will seize the air in the room. Its super cool to hear the full presentation of music at low volume, I am not accustomed to it. Normally the presentation of the music is not full scale until you get the volume up a bit , not loud but say 78-80 dB. Ill bet I hear full scale at 60 dB with Gran Vivace... in addition to this because I can only play so loud in my room and Audion can play to that limit, but the authority at which Gran Vivace operates is simply stunning. We could rock Scintillas. The Gran Vivace is for your big Wilsons, Magico, the giant Focals Von Schweikert and any of those big as a building speakers. but they still have the finesse to sound beautiful in my listening room for instance... Hope this helps By the way the patent is for the layout of a MOSFET, and as Ralph pointed out , It makes it better for anything that uses this MOSFET. That being said it does not mean that a MOSFET designed with audio in mind does not kick ass at everything, and in this instance since Alberto bought the full production run this MOSFET will never be used in anything but audio. So it actually is designed to improve audio performance and it also is exclusive to AGD. So nobody will be able to reproduce Albertos sound no matter how adept they are at copying others work. And to the one guy who said Walter is bringing GaN on .... You’ve got to know that it means about as much as a Formula 1 team saying we have a Citroen Car running rubber on the wheels just like Ferrari. It absolutely blows my mind that some people can think like this .. Mark Shifter told me he would send me one of these $2500 gems to listen to but no cigar yet and Im not going to ask at this point.Ive got other things to concentrate on , but just like anything all class A is not equal, just like all GaN Class D is not even close to equal. In my experience Ive crushed Merril GaN sound quality with every user that buys AGD. Its unanimous, AGD clearly sounds better. and his amps cost over double Albertos , My observation and opinion is its also nowhere near the chassis custom build quality of Albertos CAST ALUMINUM chassis. Merril uses common aluminum sheet stock, stacked and screwed on in multiple layers to get any thickness, while the Vivace for instance is more than 1 inch thick, solid with no seams. Its a whole different level. Its easy to see where the actual value is, no more of the HiFi BS price level. AGD does not play games he means business. I for one want to see the result if we offer an honest strong value with high performance will audiophiles be able to recognize it and have no hesitation paying retail price, or will they have permanent damage from the way HiFi is normally sold without integrity and fake discounted. I stand against the old way of stroking a customer by high price/ low price selling. its a fake out so when you pay 50% off, its actually the full MSRP manipulated up for purpose of getting people to spend compulsively. I dont support it. So No, other GaN is not the same nor close to Albertos product for that matter... Happy listening ! OCD HiFi Mikey |
Can’t afford the Gran Vivaces but am pretty sure that the SQ of the Audions is very similar to the upper models. Think they are beyond merely the “sweet spot” in the AGD line. Think the Audions are overachievers. The Vivaces should sound fuller so the Gran Vivaces. But this should be most noticeable on big musical swells. As it is on the Grans on the big organ piece on the “Gran Vivace” YouTube comparison video. Even though only MP4, one can hear that the SQ of the 3 models is, in fact, very, very similar. But the Gran Vivaces sound more dramatic on the big passages. Mostly they offer more than twice the power for those needing it. My speakers are super happy with the Audions 85 watts into 8 ohms. It has been said that “the smart money goes for the Audions”. |